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Electrostatics Unit Review

Total questions: 61

Worksheet time: 41mins

Name
Class
Date
1.

What charge does an electron have?

a)

Positive

b)

Neutral

c)

Negative

2.

If you increase the magnitude of two charges, what happens to the force between them?

a)

The force is less than before

b)

The force is more than before

c)

The force remains unchanged

3.

What is the difference between the Coulomb's force and gravitational force?

a)

Gravitational force is greater than Coulomb's force

b)

Coulomb's force is attractive, gravitational force is repulsive

c)

Coulomb's force is bigger than gravitational force

d)

Coulomb's force depends on the distance; gravitational force does not.

4.

How can an object become charged?

a)

Conduction

b)

Induction

c)

Friction

d)

All of the choices

5.

The electrical force between the charges is weakest when ______

a)

They are closest

b)

When they are farthest

c)

Force is constant everywhere

d)

Distance is not a factor in determining force

6.

What is a conductor?

a)

It allows charges to flow freely

b)

It is a source of votage

c)

It does not transfer charges freely

d)

It is used to measure the current

7.

How does an atom become charged?

a)

By losing protons

b)

By gaining protons

c)

By losing or gaining electrons

d)

By losing neutrons

8.

Which of the following particles can transfer from one object to another?

a)

electron

b)

proton

c)

neutron

d)

nucleus

9.

This law states that: Like charges repel, unlike charges attract.

a)

Coulomb's Law

b)

Law of Inertia

c)

Law of Charges

d)

Law of Conservation of Energy

10.

Which of the following is the correct unit of charge?

a)

Ampere

b)

Kilogram

c)

Newton

d)

Coulomb

11.

What is the charge of an object that lacks electrons?

a)

neutral

b)

negative

c)

positive

d)

cannot be determined

12.

What is the charge of an object that acquires extra electrons?

a)

neutral

b)

negative

c)

positive

d)

cannot be determined

13.

Which of the following will increase the electrostatic force between charges?

a)

Increasing the charge

b)

Increasing the distance between charges

c)

none of the 2

d)

both

14.

What kind of interaction will take place between these charges?

a)

they will attract each other

b)

they will repel each other

c)

they will not have interaction

15.

What kind of material will allow the easy flow of electrons through them?

a)

conductor

b)

insulator

c)

resistor

d)

transistor

16.

It is possible for our hand to lose some electrons when we touch an object.

a)

True

b)

False

17.
Two like charges
a)
 neutralize each other.
b)
repel each other. 
c)
must be neutrons. 
d)
attract each other.
18.
When a balloon is rubbed on clothes it acquires a charge by ___________
a)
Induction
b)
reduction
c)
friction 
d)
concuction
19.
Where do electrons go when you rub a balloon on your hair?
a)
Onto the balloon
b)
Into your hair
c)
Nowhere
20.
After you rub a balloon on your hair, what charge does the balloon have?
a)
Positive
b)
Negative
c)
Neutral
21.
When a glass rod is rubbed with silk and the glass rod becomes positively charged, what happens to the electrons?
a)
they are removed from the rod
b)
they are added to the rod
22.
What do you call the process of charging a conductor by bringing it near another charged object?
a)
induction
b)
polarization
c)
neutralization
d)
conduction
23.
The law of conservation of charge states that...
a)
all atoms have more protons than electrons
b)
only protons can be rubbed off of an atom
c)
charge cannot be created or destroyed
d)
charge cannot be transferred 
24.
If two balloons have the same charge, what will happen if you place them close to each other?
a)
Nothing
b)
They will be attracted
c)
They will pop
d)
They will push each other away.
25.
What is the name of this device that is used to detect charges?
a)
beaker
b)
electroscope
c)
van de graff generator
d)
chargometer
26.
Consider the conduction charging shown. 
a)
Electrons move from the insulating stand into the sphere.
b)
Protons move from the bar into the sphere.
c)
Electrons move from the charged metal bar into the sphere.
d)
Protons move from the sphere into the negatively charged bar.
27.
A positively charged rod is held near the knob of a neutral electroscope. What best describes what will happen to the leaves?
a)
the leaves will spread apart and be positive
b)
the leaves will spread apart and be negative
c)
the leaves will stay closed and be positive
d)
the leaves will stay closed and be negative
28.
What is the overall charge of an object that has been charged by polarization?
a)
Positive
b)
Negative
c)
Neutral
29.
A negatively charged rod touches the knob of a neutral electroscope. Which  best represents the distribution of charge on the electroscope.
a)
both the knob and leaves become positive
b)
both the knob and leaves become negative
c)
the knob becomes negative and the leaves become positive
d)
the knob becomes positive and the leaves become negative
30.

What is the end result of charging by friction?

a)

Both object have the same charge, so they will attract one another

b)

Both object have the same charge, so they will repel one another

c)

Both object have the opposite charge, so they will attract one another

d)

Both object have the opposite charge, so they will repel one another

31.

Coulomb's law says that the force between any two charges depends

a)

directly on the size of the charges

b)

inversely of the distance between the charges

c)

both are correct

32.
When a plastic rod is rubbed with wool, why does the wool acquire a positive charge?
a)
Protons are transferred from the rod to the wool.
b)
Protons are transferred from the wool to the rod.
c)
Electrons are transferred from the rod to the wool.
d)
Electrons are transferred from the wool to the rod.
33.
What does it mean when the electric field lines are close together?
a)
the field is positive
b)
the field is negative
c)
The field is strong
d)
the field is weak
34.
In a good insulator, electrons are usually
a)
free to move around
b)
free to move around after an impurity has been added
c)
semi-free to move around
d)
tightly bound in place
35.
Consider the electric field lines as shown in the diagram. Which of the following gives the correct sign for charge X and Y
a)
X: Positive
Y: Positive
b)
X: Positive
Y: Negative
c)
X: Negative
Y: Negative
d)
X: Negative
Y: Positive
36.
The reason that a charged balloon can stick to a wall is because the wall is charged through
a)
conduction
b)
induction
c)
friction
d)
discharge
37.
Electric field line point toward this charge
a)
negative
b)
positive
c)
neutral
d)
Coulomb
38.
Which of the following is the best description of an electric field line
a)
Electric field lines show the force experienced by a positive test charge at that location
b)
Electric field lines show the force experienced by a negative test charge at that location
c)
Electric field lines show the direction a neutral charge would experience at that location
d)
Electric field line show the direction a positive test charge would move at that location
39.
Consider the electric field lines shown in the diagram below. From the diagram, it is apparent that object A is ____ and object B is ____.
a)
+,+
b)
+,-
c)
-,+
d)
-,-
40.
What is located in the nucleus of the atom? 
a)
protons and neutrons
b)
electrons and protons
c)
electrons and neutrons
41.
Gravitational forces are 
a)
attractive only
b)
repulsive only
c)
attractive and repulsive
42.
Electric forces are 
a)
attractive only
b)
repulsive only
c)
attractive and repulsive
43.
What direction are the electric field lines around an electron?
a)
towards the charge
b)
away from the charge
44.
What is it called when an object gains a charge when touched by a charged object?
a)
Induction
b)
ESD
c)
Conduction
d)
Conducting path
45.
What method of charging is depicted here?
a)
Induction
b)
Conduction
c)
Reduction
d)
Friction
46.

which is the field for opposite charges

a)
b)
c)
d)
47.

The electrical force between the charges is weakest when ______

a)

They are closest

b)

When they are farthest

c)

Force is constant everywhere

d)

Distance is not a factor in determining force

48.

What is the charge on the picture?

a)

Neutral

b)

Positive

c)

Negative

d)

Zero

49.
Two like charges
a)
 neutralize each other.
b)
repel each other. 
c)
must be neutrons. 
d)
attract each other.
50.
What sign are the red and blue charges, from left to right?
a)
Positive, positive
b)
Positive, negative
c)
Negative, positive
d)
Negative, negative
51.

What is the triboelectric series?

a)

Like the World Series: objects compete for electrons

b)

A series of events that create a static charge

c)

A list of materials arranged by strength of electron affinity

d)

A number to show how well an object conducts electrons

52.

The triboelectric series is used to determine the charge of an object in which type of method of charging?

a)

Charging by Conduction

b)

Charging by Convection

c)

Charging by Induction

d)

Charging by Friction

53.

In which way(s) of charging do objects end up with charges of opposite sign?

a)

contact only

b)

friction only

c)

induction only

d)

contact and friction

e)

induction and friction

54.

When a glass rod is rubbed with silk, which item(s) become positively charged? (To answer this, you may need to consult the section of the triboelectric sequence that is pictured here.)

a)

glass rod only

b)

silk only

c)

both glass rod and silk

d)

neither glass rod nor silk

55.

What does polarization do to a molecule?

a)

It ionizes it.

b)

It separates opposite charges into different locations.

c)

It neutralizes it.

d)

It turns it from an insulator into a conductor.

56.
As a pair of charges is brought close together, the force between them
a)
Increases
b)
Decreases
c)
Increases only if they are the same sign
d)
Increases only if they are the opposite sign
57.

What is it called when electricity is stationary or still?

a)

Kinetic electricity

b)

Current electricity

c)

Static electricity

d)

Shocking electricity

58.

How is static electricity created?

a)

By using a battery to charge it up

b)

By creating a balanced charge on a material

c)

By plugging it into a wall outlet

d)

By creating an unbalanced charge on a material

59.

The accumulation of excess electric charge on an object is called

a)

Static electricity

b)

Electric discharge

c)

Resistance

d)

Circuit

60.
Which type of charges do these balloons have?
a)
like charges
b)
opposite charges
61.
What type of charge do these balloons have?
a)
like charges
b)
opposite charges

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